Apartment buildings. In 2103 we installed the heat recovery system to seven apartment buildings in Õismäe tee 113 (30 apartments on 5 floors); Muti 30 (two six-storey buildings – total of 70 apartments); Vilde tee (90 apartments on 5 floors); Sõpruse 251 (54 apartments on 9 floors); Narva mnt 19/21/23 (two buildings with seven floors – total of 107 apartments).
We have used different ventilation equipment VTS, Pilpit, Heathcaster. We can provide automation solutions where the ventilation equipment, heat pumps and heat assembly can be monitored via OUNET and the system can be tuned and adjusted.
Heat recovery ventilation solution.
Apartment building for forced ventilation:
· Fresh air valves are drilled and installed to exterior wall
· Existing ventilation ducts of apartments are monitored, cleaned and sealed
· Vent chimneys on the roof are renovated (thermally insulated), gaps for ventilation pipes are drilled to chimneys.
· Vent chimneys are connected via insulated ventilation pipes with ventilation equipment (power supply from electrical board) by the means of which the forced ventilation is performed in the apartments.
· Coolant circulates in the cooling coil of the ventilation equipment, which takes the air heat of Δ15 °C from the exhaust air, and transfers Δ5 °C to the coolant circulating in the cooling loop.
· Coolant is delivered to the heat pump along the pipeline.
· Δ5 °C is delivered to the liquefied coolant in the heat exchanger of the heat pump’s cooling loop, which vaporises and warms up as compressed up to 60 °C in the compressor. Vaporised coolant gives heat for heating the apartment building and making hot water by passing the heat pumps’ heat loop in the heat exchanger.
· The circulating vaporised coolant liquefies when passing the heat exchanger of heat pump’s heat loop and expansion valve.
Ventilation equipment and heat pumps, circulation pumps are connected with power supply.